|Author||Batrouni, G. G. ♦ de Forcrand, P.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||MATERIALS SCIENCE ♦ HUBBARD MODEL ♦ FERMI GAS MODEL ♦ MONTE CARLO METHOD ♦ COMPUTERIZED SIMULATION ♦ HIGH-TC SUPERCONDUCTORS ♦ THEORETICAL DATA ♦ CALCULATION METHODS ♦ CRYSTAL MODELS ♦ DATA ♦ INFORMATION ♦ MATHEMATICAL MODELS ♦ NUCLEAR MODELS ♦ NUMERICAL DATA ♦ SIMULATION ♦ SUPERCONDUCTORS 360207* -- Ceramics, Cermets, & Refractories-- Superconducting Properties-- (1992-)|
|Abstract||We discuss the fermion sign problem and, by examining a very general Hubbard-Stratonovich transformation, argue that the sign problem cannot be solved with such methods. We propose a different kind of transformation which, while not solving the sign problem, shows more detailed information about the system. With our transformation it is [ital trivial] to tell which auxiliary field configurations give a positive sign and which give a negative sign. We then discuss briefly various properties of this transformation and construct an algorithm which with one simulation gives results for a whole range of particle densities and Hubbard [ital U] values, positive and negative. Our approach is in excellent agreement with exact calculations.|
|Learning Resource Type||Article|
|Publisher Place||United States|
|Journal||Physical Review, B: Condensed Matter|
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